Multi-Point Float Level Switch Ktech Model FS701SF-1-2NPT set-point
distances are measured from the underside of the 2 NPT
bushing to the center of the float at the level where the switch
is activated.

Ktech Model FS401SF-4-2NPT Multi-Point Float Level Switch set-point
distances are measured from the underside of the 2 NPT
bushing to the center of the float at the level where the switch
is activated.